diff --git a/Create-DevTerm-A04-OS-image-from-scratch.md b/Create-DevTerm-A04-OS-image-from-scratch.md
index 9c43698..47edf31 100644
--- a/Create-DevTerm-A04-OS-image-from-scratch.md
+++ b/Create-DevTerm-A04-OS-image-from-scratch.md
@@ -59,6 +59,7 @@ sh /etc/profile.d/armbian-check-first-login.sh
 ```
 ### Install kernel
 ```
+sudo apt update
 sudo apt install -y devterm-kernel-current-cpi-a04
 apt install -y xfce4-power-manager
 touch /home/cpi/.first_start